Added arm test spec.

Will be used by chromium_trybot_arm recipe.

R=mseaborn@chromium.org, phajdan.jr@chromium.org
BUG=359338

Review URL: https://codereview.chromium.org/246623009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269655 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed